[Annoying trope] Character is completely dismissive about *one* supernatural thing in a world where so many others are encountered

Daenerys "Stormborn" Targaryen (Queen of the Andals, the Rhoynar, and the First Men, Breaker of Chains, etc.) lives in a world of millennia old noble houses, ancient empires, and witches and warlocks of every breed (having even resurrected an extinct species from fossilized eggs via blood magic!) yet it takes the greatest amount of effort from the children of House Stark to convince her that ice demons and zombies are real.

Special Agent Fox Mulder of all people falls for this one. The dude's fought vampires and secret societies and cannibalistic cults, has hunted down Bigfoot and the Loch Ness monster, and had his sister get abducted by aliens, and yet when he and Scully encounter a boy who received the stigmata, he immediately dismisses it as a scam (to Scully's absolute frustration.

Doctor Stephen Strange, prior to becoming a Master of the Mystic Arts, refuses to believe in magic, despite living in a world (nay a city!) where aliens, gods, billionaires in high tech power armor, and mad science experiments run amok have banded together to form a superhero team!

Dr. Henry "Indiana" Jones has spent his whole life studying the occult and digging up ancient and crazy treasures all around a world where to quote Honest Trailers, "Judaism is undoubtedly real, a racist version of Hinduism is undoubtedly real, and Christianity is undoubtedly real… and yet the hero is undoubtedly an atheist."